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CVE-2026-18954— Incorrect authorization in the aggregation pipeline tool in Amazon AWS Labs DocumentDB MCP Server

Quick assessment

Affected
AWS documentdb-mcp-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Amazon Open source MCP servers for AWS是美国Amazon公司的一款亚马逊云服务连接的模块集合。 Amazon Open source MCP servers for AWS 1.0.12之前版本存在授权问题漏洞，该漏洞源于聚合管道工具中的授权不正确，可写的聚合管道阶段绕过了只读模式强制逻辑，可能导致经过身份验证的MCP客户端对连接的数据库执行不适当的写操作。

CVSS 5.5 · Medium EPSS 0.16% · P4

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
AWS documentdb-mcp-server < 1.0.12 affected
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I. Basic Information for CVE-2026-18954

Vulnerability Information
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Vulnerability Title
Incorrect authorization in the aggregation pipeline tool in Amazon AWS Labs DocumentDB MCP Server
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect authorization in the aggregation pipeline tool in Amazon AWS Labs DocumentDB MCP Server before 1.0.12 might allow an authenticated MCP client to perform inappropriate write operations on the connected database via write-capable aggregation pipeline stages that bypass the read-only mode enforcement logic. To remediate this issue, users should upgrade to version 1.0.12 or later.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Amazon Open source MCP servers for AWS 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Amazon Open source MCP servers for AWS是美国Amazon公司的一款亚马逊云服务连接的模块集合。 Amazon Open source MCP servers for AWS 1.0.12之前版本存在授权问题漏洞，该漏洞源于聚合管道工具中的授权不正确，可写的聚合管道阶段绕过了只读模式强制逻辑，可能导致经过身份验证的MCP客户端对连接的数据库执行不适当的写操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS documentdb-mcp-server 0 ~ 1.0.12 -

II. Public POCs for CVE-2026-18954

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III. Intelligence Information for CVE-2026-18954

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Patches & Fixes for CVE-2026-18954 (1)

Vendor Advisories for CVE-2026-18954 (2)

IV. Related Vulnerabilities

Same vendor: AWS
Same weakness: CWE-863

V. Comments for CVE-2026-18954

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